如何在WPF中为按钮样式设置Data属性？

Question

In this example property:

Data= M150.655, 39.109L10.407, 53.785L0.602, 1.309l158.026-0.806L150.655, 39.109z

How does this Data property work and use these 5 values?

<Style x:Key="ButtonStyler"

     TargetType="{x:Type Button}">
<Setter Property="Cursor"
        Value="Hand" />
<Setter Property="Template">

  <Setter.Value>
    <ControlTemplate
      TargetType="{x:Type Button}">
      <Grid>

        <Path x:Name="ButtonBG"
              Fill="Lime"
              Stroke="#000000"
              StrokeThickness="3"  

              Data="M150.655,39.109L10.407,53.785L0.602,1.309l158.026-0.806L150.655,39.109z" />
        <ContentPresenter x:Name="ContentSite"
                          Margin="20,10,20,10"
                          VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
                          HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                          TextBlock.FontFamily="Comic Sans MS"
                          TextBlock.FontSize="20">
          <ContentPresenter.RenderTransform>
            <TransformGroup>
              <TransformGroup.Children>
                <TransformCollection>
                  <RotateTransform Angle="-5" />
                  <ScaleTransform ScaleX="1.5"
                                  ScaleY="1" />
                  <TranslateTransform X="-35"
                                      Y="0" />
                </TransformCollection>
              </TransformGroup.Children>
            </TransformGroup>
          </ContentPresenter.RenderTransform>
        </ContentPresenter>
      </Grid>
      <ControlTemplate.Triggers>
        <Trigger Property="IsMouseOver"
                 Value="true">
          <Setter Property="Path.Fill"
                  Value="yellow"
                  TargetName="ButtonBG" />
        </Trigger>
        <Trigger Property="IsPressed"
                 Value="true">
          <Setter Property="Path.Fill"
                  Value="lime"
                  TargetName="ButtonBG" />
        </Trigger>
      </ControlTemplate.Triggers>
    </ControlTemplate>
  </Setter.Value>
</Setter>
<Style.Triggers>
  <Trigger Property="IsMouseOver"
           Value="true">
    <Setter Property="RenderTransform">
      <Setter.Value>
        <TransformGroup>
          <TransformGroup.Children>
            <TransformCollection>
              <RotateTransform Angle="-5" />
              <TranslateTransform X="-5"
                                  Y="0" />
            </TransformCollection>
          </TransformGroup.Children>
        </TransformGroup>
      </Setter.Value>
    </Setter>
  </Trigger>
  <Trigger Property="IsPressed"
           Value="true">
    <Setter Property="RenderTransform">
      <Setter.Value>
        <TransformGroup>
          <TransformGroup.Children>
            <TransformCollection>
              <RotateTransform Angle="-5" />
              <TranslateTransform X="-5"
                                  Y="5" />
            </TransformCollection>
          </TransformGroup.Children>
        </TransformGroup>
      </Setter.Value>
    </Setter>
  </Trigger>
</Style.Triggers>

Answer 1

The Data is a Property of the Path object in your template...

http://msdn.microsoft.com/en-us/library/ms745814.aspx

edit:

From the msdn doco: The Data attribute string begins with the "moveto" command, indicated by M, which establishes a start point for the path in the coordinate system of the Canvas. Path data parameters are case-sensitive. The capital M indicates an absolute location for the new current point. A lowercase m would indicate relative coordinates. The first segment is a cubic Bezier curve beginning at (100,200) and ending at (400,175), drawn using the two control points (100,25) and (400,350). This segment is indicated by the C command in the Data attribute string. Again, the capital C indicates an absolute path; the lowercase c would indicate a relative path.

The second segment begins with an absolute horizontal "lineto" command H, which specifies a line drawn from the preceding subpath's endpoint (400,175) to a new endpoint (280,175). Because it is a horizontal "lineto" command, the value specified is an x-coordinate.

For the complete path syntax, see the Data reference and How to : Create a Shape by Using a PathGeometry .

Hope this helps :)

Ian

Answer 2

与形状和路径几何相关联的数据属性不会直接进入其中，首先只需阅读路径几何的基础知识，然后您就可以了解任何形状的数据属性。